openwrt/target/linux/ixp4xx/patches-4.4/002-ixp4xx_eth-use-parent-device-for-dma-allocations.patch

From 1d67040af0144c549f4db8144d2ccc253ff8639c Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jogo@openwrt.org>
Date: Mon, 1 Jul 2013 16:39:28 +0200
Subject: [PATCH 2/2] net: ixp4xx_eth: use parent device for dma allocations

Now that the platfomr device provides a dma_cohorent_mask, use it for
dma operations.

This fixes ethernet on ixp4xx which was broken since 3.7.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
---
 drivers/net/ethernet/xscale/ixp4xx_eth.c |   23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

--- a/drivers/net/ethernet/xscale/ixp4xx_eth.c
+++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c
@@ -657,10 +657,10 @@ static inline void queue_put_desc(unsign
 static inline void dma_unmap_tx(struct port *port, struct desc *desc)
 {
 #ifdef __ARMEB__
-	dma_unmap_single(&port->netdev->dev, desc->data,
+	dma_unmap_single(port->netdev->dev.parent, desc->data,
 			 desc->buf_len, DMA_TO_DEVICE);
 #else
-	dma_unmap_single(&port->netdev->dev, desc->data & ~3,
+	dma_unmap_single(port->netdev->dev.parent, desc->data & ~3,
 			 ALIGN((desc->data & 3) + desc->buf_len, 4),
 			 DMA_TO_DEVICE);
 #endif
@@ -727,9 +727,9 @@ static int eth_poll(struct napi_struct *
 
 #ifdef __ARMEB__
 		if ((skb = netdev_alloc_skb(dev, RX_BUFF_SIZE))) {
-			phys = dma_map_single(&dev->dev, skb->data,
+			phys = dma_map_single(dev->dev.parent, skb->data,
 					      RX_BUFF_SIZE, DMA_FROM_DEVICE);
-			if (dma_mapping_error(&dev->dev, phys)) {
+			if (dma_mapping_error(dev->dev.parent, phys)) {
 				dev_kfree_skb(skb);
 				skb = NULL;
 			}
@@ -752,10 +752,11 @@ static int eth_poll(struct napi_struct *
 #ifdef __ARMEB__
 		temp = skb;
 		skb = port->rx_buff_tab[n];
-		dma_unmap_single(&dev->dev, desc->data - NET_IP_ALIGN,
+		dma_unmap_single(dev->dev.parent, desc->data - NET_IP_ALIGN,
 				 RX_BUFF_SIZE, DMA_FROM_DEVICE);
 #else
-		dma_sync_single_for_cpu(&dev->dev, desc->data - NET_IP_ALIGN,
+		dma_sync_single_for_cpu(dev->dev.parent,
+					desc->data - NET_IP_ALIGN,
 					RX_BUFF_SIZE, DMA_FROM_DEVICE);
 		memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
 			      ALIGN(NET_IP_ALIGN + desc->pkt_len, 4) / 4);
@@ -874,7 +875,7 @@ static int eth_xmit(struct sk_buff *skb,
 	memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4);
 #endif
 
-	phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
+	phys = dma_map_single(dev->dev.parent, mem, bytes, DMA_TO_DEVICE);
 	if (dma_mapping_error(&dev->dev, phys)) {
 		dev_kfree_skb(skb);
 #ifndef __ARMEB__
@@ -1124,7 +1125,7 @@ static int init_queues(struct port *port
 	int i;
 
 	if (!ports_open) {
-		dma_pool = dma_pool_create(DRV_NAME, &port->netdev->dev,
+		dma_pool = dma_pool_create(DRV_NAME, port->netdev->dev.parent,
 					   POOL_ALLOC_SIZE, 32, 0);
 		if (!dma_pool)
 			return -ENOMEM;
@@ -1152,9 +1153,9 @@ static int init_queues(struct port *port
 		data = buff;
 #endif
 		desc->buf_len = MAX_MRU;
-		desc->data = dma_map_single(&port->netdev->dev, data,
+		desc->data = dma_map_single(port->netdev->dev.parent, data,
 					    RX_BUFF_SIZE, DMA_FROM_DEVICE);
-		if (dma_mapping_error(&port->netdev->dev, desc->data)) {
+		if (dma_mapping_error(port->netdev->dev.parent, desc->data)) {
 			free_buffer(buff);
 			return -EIO;
 		}
@@ -1174,7 +1175,7 @@ static void destroy_queues(struct port *
 			struct desc *desc = rx_desc_ptr(port, i);
 			buffer_t *buff = port->rx_buff_tab[i];
 			if (buff) {
-				dma_unmap_single(&port->netdev->dev,
+				dma_unmap_single(port->netdev->dev.parent,
 						 desc->data - NET_IP_ALIGN,
 						 RX_BUFF_SIZE, DMA_FROM_DEVICE);
 				free_buffer(buff);